69 383 block & parts

If it's "9F" on the flat pad it wont be an "A" body "B" block. What is the date code casting, that may sell your block. Cast into the block just below the head mating surface above the flat surface area you described. As well, there should be E383 and HP (if it was HP) along with a date code on the pad near the distributer hole and mounting.
:)